Synopsis
A storm system will approach from the gulf coast region and affect the commonwealth tomorrow morning into early Thursday morning. The heaviest precipitation will be confined to the southeastern portion of the state with the rest of the state seeing scattered snow showers. Behind the storm, skies will remain mostly cloudy and breezy with colder temperatures lasting into the weekend. A clipper system will approach on Saturday, bringing the threat of some snow showers.
Short term (Tonight through Thursday Morning)
Clouds will continue to thicken up ahead of an approaching storm from the south. Most of the computer models have come to a general consensus that the low will track off the North Carolina coast and move up the coast, deepening as it does so. With this general track, the heaviest precipitation will be confined into southeastern PA. Precipitation will overspread the area by tomorrow morning and enough warm air will be in place that a mix of rain, sleet, and snow is likely. As the storm continues to deepen, it will draw in colder air from the north and the changeover to all snow is likely by evening. There will be several hours of snow that it has prompted the National Weather Service to issue Winter Storm Watches for the entire southeast area for significant accumulations. When all is set and done, a general 3-6 inches will fall with locally higher amounts. Snow will taper off by dawn on Thursday.
Long term (Thursday into Saturday)
Behind the storm system, winds will increase from the northwest, causing colder air to funnel down from Canada. A clipper system will approach from Canada on Saturday, bringing the chance of some snow showers.
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